super resolution techniques in panoramic photography  

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wjh31
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super resolution techniques in panoramic photography

by wjh31 » Mon May 16, 2011 4:39 pm

I recently briefly looked into super resolution techniques, with a view to their eventual possible use in panoramic photography to increase resolution and reduce atmospheric artifacts. Is this something that anyone else has ever looked into, or even used?

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gkaefer
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by gkaefer » Mon May 16, 2011 6:17 pm

stacking of identical shot several images is well known...

a small example of mine:

The original image - 8mb - I shot 15 times with identical values for f and time using a tripod.
http://www.burgspiele-salzburg.at/Galerie/Panorama/stacking/bild1.jpg

the 15 images (3.7mb) stacked with EnfuseGUI:
http://www.burgspiele-salzburg.at/Galerie/Panorama/stacking/bild4.jpg

with CombineZP and "Do Weighted Average" Preset I got followig result (800kb):
http://www.burgspiele-salzburg.at/Galerie/Panorama/stacking/bild2.jpg

with 120 Watt indirect light and ISO 100 and f22 and the according Brackets of 15 images with promote control shot:
each of the 11 resulting images I did use a seperate focus...
Focusstacking of the 11 images with Herlicon Focus:
http://www.burgspiele-salzburg.at/Galerie/Panorama/stacking/bild3.jpg

PS: for panos its quit the same... just more complex... and in practice trees, flowers, people, clouds etc.. are never be fixed objects, so stacking these scenes is very difficult because no software I knwo can handle these ghosting perfect...

lg
Georg
Last edited by gkaefer on Mon May 16, 2011 6:23 pm, edited 1 time in total.

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wjh31
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by wjh31 » Mon May 16, 2011 8:29 pm

Yes there are many forms of image stacking to reduce noise and improve depth of field. Super resolution is related but to distinct to any of these. The source images are combined to increase resolution rather than any of the other available effects by running algorithms which study the finest details and subtle diffrerences in how they are captured in images to render them to a greater resolution. Maybe the wiki article explains it better than I.

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HansKeesom
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by HansKeesom » Tue Jul 12, 2011 10:24 pm

gkaefer wrote:stacking of identical shot several images is well known...

a small example of mine:

The original image - 8mb - I shot 15 times with identical values for f and time using a tripod.
http://www.burgspiele-salzburg.at/Galerie/Panorama/stacking/bild1.jpg

the 15 images (3.7mb) stacked with EnfuseGUI:
http://www.burgspiele-salzburg.at/Galerie/Panorama/stacking/bild4.jpg

with CombineZP and "Do Weighted Average" Preset I got followig result (800kb):
http://www.burgspiele-salzburg.at/Galerie/Panorama/stacking/bild2.jpg

with 120 Watt indirect light and ISO 100 and f22 and the according Brackets of 15 images with promote control shot:
each of the 11 resulting images I did use a seperate focus...
Focusstacking of the 11 images with Herlicon Focus:
http://www.burgspiele-salzburg.at/Galerie/Panorama/stacking/bild3.jpg

PS: for panos its quit the same... just more complex... and in practice trees, flowers, people, clouds etc.. are never be fixed objects, so stacking these scenes is very difficult because no software I knwo can handle these ghosting perfect...

lg
Georg

Hi Georg,

Regarding EnfuseGUI, did it create a file with a higher width and height? If so, do I need to set any setting for that? I do get larger files as result but can't see a quality improvement.

regards,
Hans
Regards, Hans Keesom
I stitch and render for other photographers. Price: 25 euro or less, no cure no pay. If you want to concentrate on your business let me do the stitching for you. Free TB of Dropbox space when you have more then 250 euro business a year.

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HansKeesom
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by HansKeesom » Wed Jul 13, 2011 11:38 am

On a more general level, could one justify thinking the following.

1. We know fisheye and wide-angle lenses make it easier to stitch panoramas when there are big surfaces on mono-color, like ceilings and blue sky.
2. We know super resolution increases the resolution.

Conclusion ? : using fisheye or wide-angle and superresolution we can create panoramas that are about as good or even better then shooting with normal or tele-lenses.

Just wondering if this is a justifyable thought.

regards,

Hans
Regards, Hans Keesom
I stitch and render for other photographers. Price: 25 euro or less, no cure no pay. If you want to concentrate on your business let me do the stitching for you. Free TB of Dropbox space when you have more then 250 euro business a year.


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